How to Calculate Pizza Calculator
What is Pizza Calculator?
A pizza size calculator compares the area and value of different pizza sizes, revealing whether a large pizza is actually better value than two mediums. Area scales with the square of the radius, so a 16" pizza is not just 33% bigger than a 12" — it's 78% more pizza.
Step-by-Step Guide
- 1Pizza area = π × (diameter/2)² = π × r²
- 2Value per square inch = Price / Area
- 3Compare cost per cm² or cost per square inch across sizes
Worked Examples
Input
12" pizza £10 vs 16" pizza £14
Result
12": 113 in² at 8.8p/in² · 16": 201 in² at 7.0p/in²
16" is 20% cheaper per square inch